diff --git a/lib/compiler/Maker/Step.zig b/lib/compiler/Maker/Step.zig
index 783e3ea2f4ad267fddfa14aae27cfed61fc0acd8..8496548b7a8970292533c1fca07ff58cc2b265aa 100644
--- a/lib/compiler/Maker/Step.zig
+++ b/lib/compiler/Maker/Step.zig
@@ -321,7 +321,6 @@ pub fn deinit(step: *Step, gpa: Allocator) void {
         .config_header,
         .fail,
         .find_program,
-        .fmt,
         .install_artifact,
         .install_dir,
         .install_file,
@@ -332,7 +331,7 @@ pub fn deinit(step: *Step, gpa: Allocator) void {
         .update_source_files,
         .write_file,
         => {},
-        .run => |*extended| extended.deinit(gpa),
+        inline .fmt, .run => |*extended| extended.deinit(gpa),
     }
     step.* = undefined;
 }
diff --git a/lib/compiler/Maker/Step/Fmt.zig b/lib/compiler/Maker/Step/Fmt.zig
index ef54df4fdc5c06942b4b8943f26bf01b7587cc59..72267c6e9fedeef3707e5e14b681c87d7636bf4e 100644
--- a/lib/compiler/Maker/Step/Fmt.zig
+++ b/lib/compiler/Maker/Step/Fmt.zig
@@ -63,3 +63,7 @@ pub fn make(
     };
     try step.handleChildProcessTerm(maker, run_result.term);
 }
+
+pub fn deinit(fmt: *Fmt, gpa: std.mem.Allocator) void {
+    fmt.argv.deinit(gpa);
+}